Sliding-shackle padlock.



F. PROKOP.

summa SHACKLE PAnLocK.

APPLICATION FILED JULY 7. 1914.

1.91%@929 Patented May 18, 1915.

2 SHEETS-SHEET 2.

gfx/wen to@ WUR WMM/woman THE NORRIS PETERS co.. PHOTO-LITHQ. WASHINGTON, D. C.

FRANK EROKOP, 0E MILNAUKEE, WISCONSIN.

SLIDING-SHACKLE PADLOCK.

Liconsa.

Specification of Letters Patent.

Patented May 18, 1915.

Application filed. July 7', 1914. Serial No. 849,531.

.T0 all fr0/ionil it may concern Be it known that I, FRANK Pizoior, a citi- Zen of the United States, residing at Milwaukee, in the county of Milwaukee and State of lVisconsin, have invented new and useful Improvements in Sliding- Shackle Padlocks, of which the following is a specification.

This invention is an improved sliding shackle padlock in which the locking bolt is actuated by a key operated tumbler and a false tumbler is provided into which the key is initially inserted, a stop is employed to control the operation of the tumbler by the key and controlling means is also employed for operating` the stop, remove the latter into or out or' position to permit the engagement of the key with the tumbler, thereby rendering it necessary for a person to be provided not only with a key for opening the lock but to also know the structure of the stop operating mechanism.

The invention consists in the construction, combination and arrangement of devices hereinafter described and claimed.

In the accompanying drawings Figure 1 is a plan of my improved padlock in released position and with one member of the casing removed so as to disclose the interior mechanism. Fig. 2 is a similar view of the same in locked position. Fig. 3 is a transverse sectional view on the plane indicated by the line a-a of F ig. 1. Fig. 4 is a similar view on the plane indicated by the line J-b of Fig. 2, and showing the stop in position to prevent the engagement of the key with the tumbler. Fig. 5 is a similar view on the plane indicated by the line 0 0 of Fig. 1 and showing the stop arranged out of the way of the key. Fig. 6 is a detail plan of the stop controlling and operating knob and its associated parts. Figs. 7 and 8 are detail views.

The lock case or body 1 is here shown as of rectangular form in plan and oval cross sectionally and is composed of a pair of members 2 3 which are detachably secured together by posts 1 with which the member 3 is provided and screws 5 the heads of which are countersunk in the member 2, and which engage threaded openings in the posts.

A shackle 6 is provided which has parallel arms 7 8 the latter being longer than the former and the arm 7 being provided with a lock notch 9. These arms operate in openings 10 in the opposing sides of the members of the lock case and guides 11 are also provided or the arm 8 and also a spring 12 which by bearing against the inner end of the arm 8 serves to project the shackle when the latter is disengaged by the bolt 13.

The bolt 13 is mounted for movement in a guide frame 14- and has a stud 15 at its inner end. A spring 16, to project the bolt and engage the saine with the notch 9 is arranged in the guide frame 14 and bears between the inner ends of said guide frame and the inner ends of the bolt. rllie bolt has a cam portion 17 to engage the notch 9 and to cause the bolt to permit the passage of the inner end of the arm 7 of the shackle and cause the shackle to be engaged by the bolt, the bolt also having a recess 18 in its outer end to clear the inner end of the shackle arm 7.

A plate 19 is detachably secured in the bottom of the casing member 3 by means ot screws. A cylindrical tumbler 21 is arranged at right angles to and opposite the outer end of the bolt and has at its outer end, which is nearest to the bolt, an eccentrically arranged stud 22 for engaging and moving the bolt inwardly to release position when the tumbler is turned. r1`he tumbler also has an annular groove 23. A bearing ring 2A is secured on the plate 19 and extends around the tumbler and engages the groove 23. Hence the tumbler is held by the ring and permitted to turn therein, the ring being iixed to the plate 19. The tumbler is also engaged by a bearing standard 25. Said standard is secured on the plate 19, as shown in Figs. 4 and 5. A false tumbler 26 is arranged in line with the tumbler 21 and is spaced from one end thereof. rlhe false tumbler also is cylindrical in form and is mounted in a bearing opening 28 which is formed in the opposing side of the casing members 2-3 at the outer end of the casing. The false tumbler is engaged by a bearing standard 29 and has an enlarged inner end 30 forming a shoulder. A washer ring 31 bears between the Vsaid shoulder and the approximate wall of the casing. A suitable key 32 is provided. The stem of the key corresponds in cross-section with a key-way 33 which extends through the false tumbler and also corresponds with a similar key-way 34; which extends through the tumbler. The stem and the key-ways are here shown as cross-Shaped but may be of any suitable construction, as will be understood. The

key must be first placed in the false tumblerv and pushed inwardly through the key-way thereof and engaged with the key-way in the tumblerv 21 in order to turn the latter to operate the bolt. The false tumbler being freely mounted for rotation may be turned by the key as required to aline its key-way with that of the tumbler, as will be understood. l A stop 35 is provided which is arranged to operate in the space between the opposing ends of the tumbler and false tumbler. This stop is provided at its inner end with an actuating arm 36 and a traveling arm 37 which is spaced from the actuating arm. The actuating arm has an angular opening 3S. The traveling arm has a threaded opening 39. A stop .stud 40 projects from the plate 19. A knob 41 has a cylindrical shank 42 mountedV in a bearing opening 43 formed in the opposing sides of the lock case members, said knob being arranged near and at the same end of the lock case with the false tumbler. A shaft 44 projects from the inner end of the knob shaft and has a cross sectionally angular portion 45 adapted to fit in the opening 38 of the actuating arm 36 and also has a reduced extension 46 provided with screw threads 47 spaced from the angular l portion 45 and a head 48 spaced from said screw threads. This reduced extension 46 passes through the opening 39 'of the traveling arm 37 of the stop. Thereby the stop is mounted on the shaft of the knob. The arm 37 bears against one side of the stop stud 40 and is held there by the tension of a spring 49 which is arranged on the shaft 44 and bears between the arm 36 and the 'inner end of the knob shank 4.2. Said knob shank together with the knob shaft and knob are longitudinally movable las well as revoluble. A spring 50 has one end secured to the plate 19 and bears at the other end on the stop, said spring `acting to normally hold the stop in such position in the space vbetween the tumbler and false tumbler as to be interposed between their key ways and hence prevent the key when inserted in the key way of the false tumbler to be pressed in` wardly far enough to be engaged with the key way of the tumbler.

The key may be readily at any time engaged with the key way of the vfalse tumbler and the latterturned by such key. Such turning of the false tumbler, however, is

merely idle and is ineffective and is only to confuse a person who, possessed of :the key, should attempt Vto open the lock without knowing the Vstructure which controls the operation of the knob and the stop which is actuated by the knob. In order to open the lock a person who knows the structure must turn the knob in the required direction and the required number of times to cause the threads 47 by engagement with the threaded opening 39 of the arm 37 to move the angular portion 45 of shaft 44 close to and' coincident with the opening 38. I-Ie must then l pressthe knob and its shaft inwardly against the tension of the spring 49 to engage said angular portion 45 with the sides of the opening 38, thereby locking the stop to the knob shaft, and he must then turn the knob 1 in one direction and cause the stop 35 to turn therewithA a sufficient distance to uncover the key way in the tumbler 21. The key must then be pressed in far enough to engage the key way of the tumbler and then turned so as to cause the cam stud 22 of saidtumbler to move the bolt 13 inwardly and fthereby cause the Vbolt to disengage the notch 9 and hence'release the shackle.

Having thus described my invention, I claim 1. In a lock, a bolt, a key operated tumbler to actuate' the bolt, a key operated false' tumbler, a key stop movable into and out of posit-ion to prevent the engagement of the key with the tumbler, said stop having a traveling arm and also having anactuating arm, the latter provided with a non-circular opening, and a knob mounted for rotation and having -a shaft provided with a non-circular portion to engage the opening of the actuating arm and with a threaded portion to engage a threaded opening in the traveling arm.

2. In a lock, a bolt, akey operated tumbler to actuate the bolt, a key operated false tunibler, a key `stop movableinto and out of po sition'to prevent the engagementof th-e-key with the tumbler, said s'top'hav'ing a traveling arm and also having an actuating arm,- the latter provided with a non-circular opening, and a knob mounted for rotation and having a shaft provided with a non-circular portion to engage the opening of the actuating arm and with athreaded portion to eri-V gage a VVthreaded opening in the ltraveling arm, a spring to normally move the knob out of such engaged position and la spring to normally hold the stop in position -to preventthe `insertion of the key in `the tumbler.V

In testimony whereof I affix my signature V in presence of two witnesses.

.Copies of this patent maybe obtained for-"tive cents each, by `addressing fhe"0ommiss'ioner of 'EI'aEccntil `Washington, I). C'. 

